2CDS213103R0255 ABB SH203-B25NA MCB 6 kA 3P+N Type B 25 A

Why Choose the ABB SH203-B25NA Miniature Circuit Breaker?

The ABB SH203-B25NA is a compact and reliable 3P+N miniature circuit breaker (MCB) designed to provide overload and short-circuit protection in electrical installations. As part of the ABB SH200 MCB range, it combines a 25 A rated current, Type B tripping characteristic and 6 kA short-circuit breaking capacity in a four-module DIN rail-mounted format.

The SH203-B25NA uses thermal and electromagnetic tripping mechanisms to provide dependable circuit protection. The delayed thermal mechanism protects against sustained overload conditions, while the electromagnetic mechanism provides rapid operation during short circuits. Its Type B characteristic makes it particularly suitable for circuits where low inrush currents are expected during normal operation.

With a rated current of 25 A, a 6 kA breaking capacity and a 3P+N configuration, the SH203-B25NA provides practical protection for three-phase circuits incorporating a neutral conductor. Its four-module construction and standard DIN rail mounting make it straightforward to integrate into residential, commercial and electrical distribution boards.

Key Advantages

• Compact miniature circuit breaker for overload and short-circuit protection.
• 25 A rated current for electrical distribution circuits.
• Type B tripping characteristic suitable for circuits with low inrush currents.
• 6 kA short-circuit breaking capacity.
• 3P+N configuration for three-phase circuits incorporating a neutral conductor.
• Compact four-module construction for DIN rail-mounted distribution boards.

Key Features

• ABB SH200 MCB range.
• 25 A rated current.
• Type B tripping characteristic.
• 6 kA rated short-circuit breaking capacity.
• 3P+N pole configuration.
• Thermal overload and electromagnetic short-circuit tripping mechanisms.
• Four-module construction based on 17.5 mm DIN modules.
• DIN rail mounting for modular electrical distribution systems.

Reliable Protection for Electrical Circuits

Miniature circuit breakers such as the ABB SH203-B25NA automatically interrupt electrical circuits when an overload or short circuit occurs. The SH200 design combines a delayed thermal tripping mechanism for overload protection with an electromagnetic tripping mechanism for short-circuit protection, helping protect electrical wiring and connected equipment from damaging overcurrent conditions.

The Type B characteristic is intended for circuits with comparatively low inrush currents and provides sensitive short-circuit protection for suitable electrical loads. Combined with its 3P+N configuration, the SH203-B25NA offers a compact solution for protecting three-phase distribution circuits incorporating a neutral conductor.

Typical Applications

• Three-phase electrical distribution boards.
• Residential electrical installations.
• Commercial buildings and distribution systems.
• Lighting and general power circuits.
• Circuits with low inrush current requirements.
• DIN rail-mounted electrical control and distribution panels.